For example, suppose that users are not completely clear on how an order
entry system should work. The analyst team might build a series of HTML pages
to be viewed on a Web browser to help the users visualize such a system. In this
case, a series of mock-up screens appear to be a system, but they really do nothing.
Or, suppose that the project team needs to develop a sophisticated graphics program
in Java. The team could write a portion of the program with artificial data to ensure
that they could create a full-blown program successfully.